句子改错,先指出错误并把序号填在括号里,然后在后面横线上改正.1
问题描述：
句子改错,先指出错误并把序号填在括号里,然后在后面横线上改正.1
---What School are you in?---I am in No.2Middle School.
A B C
（ ）_________________________
答
A.which